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https://issues.apache.org/jira/browse/SPARK-14858?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15259184#comment-15259184
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Apache Spark commented on SPARK-14858:
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User 'hvanhovell' has created a pull request for this issue:
https://github.com/apache/spark/pull/12720

> Push predicates with subquery 
> ------------------------------
>
>                 Key: SPARK-14858
>                 URL: https://issues.apache.org/jira/browse/SPARK-14858
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Davies Liu
>
> Currently we rewrite the subquery as Join in the beginning of Optimizer, we 
> should defer that to enable predicates push down (because Join can't be 
> easily pushed down).
> cc [~hvanhovell]



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